1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 package org.apache.myfaces.shared_orchestra.renderkit.html.util; 20 21 22 23 24 /** 25 * Converts characters outside of latin-1 set in a string to numeric character references. 26 * 27 */ 28 public abstract class UnicodeEncoder 29 { 30 /** 31 * Encodes the given string, so that it can be used within a html page. 32 * @param string the string to convert 33 */ 34 public static String encode (String string) 35 { 36 if (string == null) 37 { 38 return ""; 39 } 40 41 StringBuffer sb = null; 42 char c; 43 for (int i = 0; i < string.length (); ++i) 44 { 45 c = string.charAt(i); 46 if (((int)c) >= 0x80) 47 { 48 if( sb == null ){ 49 sb = new StringBuffer( string.length()+4 ); 50 sb.append( string.substring(0,i) ); 51 } 52 //encode all non basic latin characters 53 sb.append("&#" + ((int)c) + ";"); 54 } 55 else if( sb != null ) 56 { 57 sb.append(c); 58 } 59 } 60 61 return sb != null ? sb.toString() : string; 62 } 63 64 65 }